Control syringe



Sept- 21; 1948. 1 B. sTALLcUP CONTROL SYRINGE 'Filed June e, 1945 IVENTOR. un ,e wma@ patented Sept. 21A, i948 UNITED STATES PATENT OFFICE CONTROL SYRINGE I, Lester B. .Stallcup, uPhoenix, Ariz. Application June 6,1946, serial No. 674,860

This invention pertains to control syringes for the intravenous administration of anesthetics.

While the advantages of administering pentothal sodium as an anesthetic intermittently thru a. single venipuncture and of keepingthe needle and other passageways open by a continuous flow of saline solution has been heretofore recognized, little has been done to provide specialized apparatus to eiciently attain the results desired. Heretofore where anesthetics were administered intravenously only ordinary standard syringes and attendant apparatus have been available.

One of the objects of` this invention is to provideapparatus by which controlled `and indicated dosages ofanesthetics maybe administered intravenously by a syringe and mixed with,` or preceded, or followed by saline injection supplied under pressure.

Another object of a holder foi'` a hypodermic syringe arranged so that measured quantities of fluid anesthetic may be drawn into it, injected thru a needleand`im I mediately thereafter a saline wash solutionwill flow thru the needle to'keep it from clogging.` i

A still further object is to provide a holder for a hypodermic syringe adapteditobe supported on anarm rest attached to an operating chair s claims." (ci. 12s-21s) The syringe and the other attendant elements the invention is to provide as illustrated in my `copending application serial Number 656,659, Patent Number 2,418,561,

April 18, 1947, combined with a system check valve and a manual cut-oil valve connected so that fluid anesthetic may be drawn from a container, forced in measured quantities thru the needle into portions of the patients body, and immediately thereafter a neutral solution can be flowed thru the needle to keep it clear of clogging and supplant blood losses.

Other objects Will appear hereinafter.

I attain the' foregoing objects by means of the devices shown in the accompanying drawings in which Figure 1 is a side elevation of a control syringe l embodying myimprovements;

Figure 2 a plan view thereof;

Figure 3 a sectional elevation of same;

Figure 4 an elevational view of the outer` end of the device, and

Figure 5 an elevation of the innerend with portions brokenaway to show interior construction.

Similar numerals refer to similar parts inthe several views. y

The term control syringe refers to the entire device here concerned, and includes, a standard y hypodermic syringe as one of the operative parts.

are mounted in a case 2 made of cast metal and provided with a longitudinal bore f3 adapted to receive the hypodermic syringe `4. A threaded nut 5 and .packing gland fitting 6 secure the outer end of the syringe barrel 'I in the case. The inner end of the barrel bears against a rubber ring I2 at the inner end of bore 3.

Finger grips 9 are formed on the outer end of the case adjacent the plunger 8` for convenient operation of the plunger so that measured quantities of anesthetic fluid can be injected or ejected by the Vsyringe as indicated `by the graduations 19 on syringe barrel l, which is exposed by the elongated openings I3 in the top of the case.

Along the bottom of the case is a longitudinal dove tail groove I0 adapted toreceive a corresponding slide I I which may be part of a shelf I6 attached to an operating Vchair arm rest. (See my co-pending application, Serial Number 658,659.) I5 on the underside of shelf I5 will retain case 2 4from longitudinal movement on said slide by engagement in a hole -I in the underside of `groove I0.

A valve block 20 made of stainless steel is removably secured in the inner end of case 2 by a nut2l threaded on a boss 22 which proitrudes thru a hole 23 in the inner end of the case.

This block has a longitudinal horizontal bore 25 extending thru its upper portion alined with thesyringe tip 5I and extending from boss 26 on its inner face 21 adjacent the inner Aend of the syringe barrel to boss 22.` Within counter-bore 30, in its outer portion, a spring loaded ball check valve 3l operates. A bushing 32 provided with an outlet nipple 33 to which a tube carrying a hypodermic needle may be attached closes the outer `end of bore 30. A vertical hole 34 `forming an anesthetic channel extends from a boss on the bottom face of the block and `joins the inner portion of longitudinal bore 25. A second and parallel vertical hole 36 forming a saline solution channel extends upward from a boss 3l and joins the lcounter-bore 30 Ibeyond the ball checkI. i l

A transverse bore 38 extends inward from .a boss 39 on the outer face of this block and bottoms justshortof its inner side face. This bore inter- A slide locking pin I4 carried on spring which carries the han?.

Nipples 43 and t# carrying check valves 45 and 46 are threaded onto bosses 35 and 3l, and are adapted to receive rubber` tubes leading to containers for anesthetic and saline solutions respectively. Nipple 43 may be termed the anes thetic nipple and M the saline solution nipple.

All metal parts Which come in contact With saline solution are made of stainless steel. Other parts contactingsolutions. must be of. substances impervious'to thema Case.2 maymbeimad'e of aluL vl0 minurn alloy as also are the partsof the arm rest shown.

AIn use the case is slid onto the arm rest guide" from left to right (Figure 1) until the lockihgapinitz. engages. Syringe 4 is attached to bossA Zby 21.,.15 rubber tube t9. Rubber tubes from solutiontcon tainers are attached to nipples lirfgand 4,4.; andgia ,1w rubber tube leading to hypoderrnic needleis attached to nipple 33. rhe tube connected tofnipple i3 leads to a container offpentothal sodium, the 20 tubeiconnectedfto nipplefllt leadsn'to:a.,reont'ainer' holdinga sterilei-salinesolutions.; With'thelallll ratusprepared as.abovestated;manuallavalvevlilif is opened,` the .plungerwz iswithdrawnffto dravffv anesthetic solution. thru. check valvefll .and nole-r "25I M :aTheplunger is then pushed in ito'force:arles-fZ theticsolutio'n' past ball 'checkl valve;dl-tlirufnipll ple 33 and the tubeand hypodermicneedfle'Lat-. tached -thereto. After'thisinjective action-saline solutionL will enter thrufcheck.` valve y liti; fiotvl thine-30 hole SiiJand-out thru ynipple S3-'tothe hypodermic 1f needle.'V

Thereafter, if radditionalfdosage of ranesthetic.z is -neededg-l it zis only necessary-to further'insert-VV plunger 8, ff If necessaryI a freshcsupp'ly o-fanes-r 35 l. thetic-can Abe drawn intoltheisyringel by" an outward VmovementI of plunger- Si In 'thisoperati'on-w fresh solution is drawninthruivalve dnhile'ovv of saline vsolution intol the .syringe-thru l here "f2 is prevented by checkvalve'l. i Tliereafterkinjec# '40 t tion--may-again bemade.: Meanwhilethe ilotvof; salin-e-solutionethru valve-'ll-"continuesat all-'times when -notbacked up by the pressurefof van injecftion. The'flovv `ofthe saline-solution keeps-the needle and its attendant parts clear and A'fre'e .45..` fromr clotting;- ande at -thefl'sameftim'e supplants fluid losses inthe- -blood 'streamfo-f the-patiente I At the end-of-the-ioperationethefrnanual fivalve il() is closed andtheajpparatus disconnected from-i thehypoderrnicneedle andffrom -the supply tubes. 50: Lever` l5 inayj-then '-f-bejdepressed-toi disengage locking pin"V l 4 and fthe' enti-re cas ei is slid outward and removed fromttheJshelf'flfSii The/:cap 48-can`-'"' then b-e rattached -to threadedboss' 22 ftoprotectf the-hypodermic'tubenipple From-the -foregoing ritl will be seen4I that L'h'aw'e-l provided a simple rand* efficient* control sfyrin'gew' unit-' `which y will j hold Ha standard]'hyp'odermict" syringe-in a'convenierlt position onanarrrr'board'1 on which `the -patientsarlns frestsf"during'rtreat' '60.; ment, and which is easilydisassembl-ed@romane ing andsterilization'. The'entireyalve"fbl'ojck' may' bei removedv by'unscrewing nutjv 21 o-nf'b'ojss 22 removing tube (i9 'anddroppingfthe f'lologcli'` thru the bottornof case 2,withthe'boss` 'carrying'" valve',65 handle d dropping thru slot 50` in the side "cifthez` case.`

The syringe barrel may, be removed ,byl'loose'n-W ingglandnut. Nipples 43 and4"4 lnay"be "un"' screwed iromblock 2 U andthe vvalves cleaned ahdyoi iv sterilized. Since *these valvesd areA of standard construction-no :further 'detail' as' to Itheir vstr ucl -j ture-andoperation'fis 'thought -to beinecessary".`Y4 1 Thearrangement of parts-,l-as describedA enables? the user of the apparatus to administer pentotha'l'y sodium solutions intravenously over a considerable period of time and in quantities greater than the unit capacity of the syringe. This is particularly advantageous where dilution of the solution is indicated. The advantage of rproviding the controllable ow of saline solution will at once be apparent to those familiar with the art.

Since various alternate forms and modications can be. made to-the severahpartsI of. the control syringe reasonablyzbroadfzinterpretation should begiven to the following claims.

. I claim:

1. A control syringe for intravenous administrati'on:l of anesthetic solutions comprising, in combination a hypodermic syringe, a case adapted fonattachmentto an operative chair arm board, havingfra.flongi-tudinal bore means for securing said hypodermic syringe barrel therein so the scale Lthereon will be Visible, a valve block having a main channel adapted to connect to the tip of said hypo'd'ermic `syringe atfits inneriendariditoa nipple Fadaptedato carry fa hypodermircmeedlei-tubeizzi at theouterfenfdd anoutwardly:;opening {check valve therein, a ychannelhavingandnearthyforense: ingcheekr valve .fattached'tofanipplegadaptedfor r connection'ftofa solutionfofwpentothal "sodium,

nection Y to a tube supplying saline =solution;* and opening tinto i said i main; channehf outwar'dt-frein-WJ said ;check-"valve at its'in'nerend.' v

2. Apparatus? for intravenous a dniinistration "off:- anesthetic including,y in combination', fa hyp'o'de" mic syringe havinga cylindrical barrel',"a-scale`l" thereon l anda Stemat: its outer end; afcasehalv-fi ing a longitudinal bore and a glandpa'ckingatits inner end adapted to removably retain-said"hypo dermi-c s'yringeyand an 'opening'alo-ng the t'opfor viewingv the syringe scale, a Valve`- blck positionedwithin the outer-end portion of said case lhavingi* a horizontal bore .'alined Iwith" ,the 'stem 'of "said syringegan'outwardly opening checkrvalvitherew infan outlet'nippleat thetoute'rf'eneln of'said borevv adapted" for'I attachment l'to a Vrubber tube' an anestheticnippleon' the""botto'rn "of saidblo'ck" having?aninwardlyopening :check"valv'fconnecting thru a holev 'to' said'ih'orizontal `borenn the insidnf the checkvalvetherein, "ai saline nipple 'j havingv4 an" inwardlyopening check'.v'alvefrtherein'i connectirigtthru :a saline hole, to said horizontal 3. Apparatus for 1ntravenou anesthetic including. incombi derrnic 'syringeprovided withialcylin'diical a scale therebnand an axial's means .for attachment to` an operating vchair., horizontal `bore' adapted tdreceve lsaidhypoderi.. mic syringe barrel, aQglard .packiigfladaloted."to secure the innerlend'osaid syringe harrelopen able on theinnenend 'ofsaidfcasa'a scale viewing windowin the 'upper -side thereof; and' anannu'.r lar shoulder to receive the outer end"ofsai'd' 'syr ing'ef barrel a-v valve" block retained xin the -outer end'eof said beschaving a horizontaPbore alineado` with said syringe stem, and connected therewith@ an`l outward-ly opening' check-valve thereinatube nipple at the outer end of Asaid bore, anvangularly-U disposedchanner connecting'witlrsaid axial bore between 4Asaid syringe 'and ther4 ch'eclfivalver tl'iereinr leading t0 "af/tube nipple onfthe outef-*faceof'said LESTER B. STALLCUP.

REFERENCES CITED The following references are of record in the ille of this patent:

5 UNITED STATES PATENTS Number Name Date 2,322,753 Thomas June 29, 1943 FOREIGN PATENTS 10 Number Country Date 111,782 Australia Oct. 23, 1940 Great Britain Oct. 16, 1919 

